$NetBSD: patch-configure,v 1.1 2023/04/27 13:33:47 yhardy Exp $

Use GLEW for GL extensions, works around a linking problem on NetBSD.

--- configure.orig	2022-01-15 21:25:37.000000000 +0000
+++ configure
@@ -8784,9 +8784,9 @@ $as_echo_n "checking for OpenGL support.
      SYS_GL_LIBS="-F/System/Library/Frameworks -framework AGL -framework OpenGL"
                   CPPFLAGS="$CPPFLAGS -D__DARWIN__ -F/System/Library/Frameworks -I/System/Library/Frameworks/OpenGL.framework/Headers"  ;; #(
   *-*-linux*) :
-     SYS_GL_LIBS="-lGL -lpthread"  ;; #(
+     SYS_GL_LIBS="-lGLEW -lGL -lpthread"  ;; #(
   *) :
-     SYS_GL_LIBS="-lGL"  ;;
+     SYS_GL_LIBS="-lGLEW -lGL"  ;;
 esac
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */